Connecting An Ac Reactor Or A Dc Link Choke - YASKAWA L1000A Technical Manual

◆ Connecting an AC Reactor or a DC Link Choke

Placement
■
When connecting to a power supply transformer with greater than 600 kVA capacity, or when switching a phase advance
capacitor, large peak current can flow through the input power supply circuit and damage converter components in the
drive.
As a preventive measure, install an AC reactor or a DC link choke to the input side of the drive. Installing an AC reactor
or a DC link choke will also help improve the power factor.
Install an AC reactor or a DC link choke if a DC drive or another type of thyristor converter is running from the same
power system, regardless of the power supply conditions shown in
Note: A DC link choke is built in to the drive models CIMR-LU20085 to 20415, 40045 to 40605, and 50032 to 50200.
Figure 8.20
Connecting an AC Reactor
■
Figure 8.21
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
4000
Power supply harmonics
AC reactor or DC link choke
Power Supply
required
Capacity (kVA)
600
0
60
Drive Capacity (kVA)
Figure 8.22 Installing an AC Reactor or DC Link Choke
A B
A – Power supply
B – MCCB
Figure 8.23 Connecting an AC Reactor
8.5 Installing Peripheral Devices
Figure 8.22.
AC reactor or DC link
choke unnecessary
400
C D
U X R/L1
V Y S/L2
W Z T/L3
C – AC reactor
D – Drive
Y E A _ T -
Monly
Common_
TMonly
8
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